What happened to GUT grand unified theory.

Is our missing antimatter hiding in a mirror universe?
Some scientists think a time-reversed anti-universe exists alongside ours — a place where antimatter rules and their “forward” is our “backwards.” If true, it could solve one of physics’ biggest mysteries.

In this video: the antimatter imbalance, CPT symmetry, and what life in a mirror reality might be like.

Could our missing antimatter be hiding in a parallel, time-reversed universe?
Physicists have long puzzled over one of the biggest mysteries in cosmology: why our universe is made almost entirely of matter, when the Big Bang should have created equal amounts of matter and antimatter. Some theories suggest that the answer lies in a mirror universe — a realm where antimatter dominates and time flows in the opposite direction to ours.

In this episode of Stellar Stories, we explore:

The mystery of the matter–antimatter imbalance.

How CPT symmetry could explain a time-reversed anti-universe.

The physics of why time’s arrow might be local, not universal.